Search results

1 – 10 of 93
Click here to view access options
Article
Publication date: 16 November 2021

Md Helal Miah, Jianhua Zhang and Dharmahinder Singh Chand

This paper aims to illustrate the tolerance optimization method based on the assembly accuracy constrain, precession constrain and the cost of production of the assembly product.

Abstract

Purpose

This paper aims to illustrate the tolerance optimization method based on the assembly accuracy constrain, precession constrain and the cost of production of the assembly product.

Design/methodology/approach

A tolerance optimization method is an excellent way to perform product assembly performance. The tolerance optimization method is adapted to the process analysis of the hatch and skin of an aircraft. In this paper, the tolerance optimization techniques are applied to the tolerance allocation for step difference analysis (example: step difference between aircraft cabin door and fuselage outer skin). First, a mathematical model is described to understand the relationship between manufacturing cost and tolerance cost. Second, the penalty function method is applied to form a new equation for tolerance optimization. Finally, MATLAB software is used to calculate 170 loops iteration to understand the efficiency of the new equation for tolerance optimization.

Findings

The tolerance optimization method is based on the assembly accuracy constrain, machinery constrain and the cost of production of the assembly product. The main finding of this paper is the lowest assembly and lowest production costs that met the product tolerance specification.

Research limitations/implications

This paper illustrated an efficient method of tolerance allocation for products assembly. After 170 loops iterations, it founds that the results very close to the original required tolerance. But it can easily say that the different number of loops iterations may have a different result. But optimization result must be approximate to the original tolerance requirements.

Practical implications

It is evident from Table 4 that the tolerance of the closed loop is 1.3999 after the tolerance distribution is completed, which is less than and very close to the original tolerance of 1.40; the machining precision constraint of the outer skin of the cabin door and the fuselage is satisfied, and the assembly precision constraint of the closed loop is satisfied.

Originality/value

The research may support further research studies to minimize cost tolerance allocation using tolerance cost optimization techniques, which must meet the given constrain accuracy for assembly products.

Details

Aircraft Engineering and Aerospace Technology, vol. ahead-of-print no. ahead-of-print
Type: Research Article
ISSN: 1748-8842

Keywords

Click here to view access options
Article
Publication date: 11 June 2021

Ruihao Lin, Junzhe Xu and Jianhua Zhang

Large-scale and precise three-dimensional (3D) map play an important role in autonomous driving and robot positioning. However, it is difficult to get accurate poses for…

Abstract

Purpose

Large-scale and precise three-dimensional (3D) map play an important role in autonomous driving and robot positioning. However, it is difficult to get accurate poses for mapping. On one hand, the global positioning system (GPS) data are not always reliable owing to multipath effect and poor satellite visibility in many urban environments. In another hand, the LiDAR-based odometry has accumulative errors. This paper aims to propose a novel simultaneous localization and mapping (SLAM) system to obtain large-scale and precise 3D map.

Design/methodology/approach

The proposed SLAM system optimally integrates the GPS data and a LiDAR odometry. In this system, two core algorithms are developed. To effectively verify reliability of the GPS data, VGL (the abbreviation of Verify GPS data with LiDAR data) algorithm is proposed and the points from LiDAR are used by the algorithm. To obtain accurate poses in GPS-denied areas, this paper proposes EG-LOAM algorithm, a LiDAR odometry with local optimization strategy to eliminate the accumulative errors by means of reliable GPS data.

Findings

On the KITTI data set and the customized outdoor data set, the system is able to generate high-precision 3D map in both GPS-denied areas and areas covered by GPS. Meanwhile, the VGL algorithm is proved to be able to verify reliability of the GPS data with confidence and the EG-LOAM outperform the state-of-the-art baselines.

Originality/value

A novel SLAM system is proposed to obtain large-scale and precise 3D map. To improve the robustness of the system, the VGL algorithm and the EG-LOAM are designed. The whole system as well as the two algorithms have a satisfactory performance in experiments.

Details

Industrial Robot: the international journal of robotics research and application, vol. 48 no. 5
Type: Research Article
ISSN: 0143-991X

Keywords

Click here to view access options
Article
Publication date: 2 February 2021

Jianhua Zhang and Mohammad Shahidul Islam

The primary purpose of the study is to examine the role of market power in driving innovation and productivity of intangible intensive firms of eight emerging economies of…

Abstract

Purpose

The primary purpose of the study is to examine the role of market power in driving innovation and productivity of intangible intensive firms of eight emerging economies of the Association of Southeast Asian Nations (ASEAN-8).

Design/methodology/approach

There is hardly any study on emerging economies that explored the causal chain of R&D–innovation–productivity, considering the role of market power in a structural model. Taking advantage of the availability of firm-level data and following the extended version of the Crépon, Duguet and Mairesse (CDM) model, we intend to fill the gap. The CDM model first explores the link between R&D and innovation, then the latter's impact on productivity. Besides, it captures sectoral heterogeneity and the differing roles of technological and institutional innovation on productivity.

Findings

The manufacturing firms that held a higher markup had a more significant contribution to driving innovation than services one. While institutional innovation affected productivity positively, technological innovation had the opposite impact. Nevertheless, firms' higher degree of monopoly, in general, worsened productivity outcomes. The estimated results are robust to a range of alterations.

Practical implications

The study offers implications for the competition policy of ASEAN.

Originality/value

The sample of this study accounts for almost half of the world's best-performing emerging economies. Thus, the findings are likely to contribute to the thin literature on market power's role in driving innovation and productivity in the intangible economy of emerging markets.

Details

International Journal of Emerging Markets, vol. ahead-of-print no. ahead-of-print
Type: Research Article
ISSN: 1746-8809

Keywords

Click here to view access options
Article
Publication date: 3 August 2021

Jianhua Zhang, Shengyong Chen, Honghai Liu and Naoyuki Kubota

Abstract

Details

Industrial Robot: the international journal of robotics research and application, vol. 48 no. 5
Type: Research Article
ISSN: 0143-991X

Click here to view access options
Article
Publication date: 20 January 2022

Fredrick Ahenkora Boamah, Jianhua Zhang, Muhammad Usman Shehzad, Sherani and Dandan Wen

Creativity and productivity are important factors for corporate and government institutions in the COVID-19 era. As a result, there is an urgent need to ensure that…

Abstract

Purpose

Creativity and productivity are important factors for corporate and government institutions in the COVID-19 era. As a result, there is an urgent need to ensure that construction projects can recover adequately to survive potential surges or even potential epidemics. Therefore, this study aims to explore social capital by examining the effect/impact of knowledge creation on construction performance in the COVID-19 era.

Design/methodology/approach

A simple random sampling approach focused on Ghanaian construction firms was used. Completed responses were obtained and analyzed from employees who had tasks on sites. SmartPLS 3.3.3 and Statistical Package for Social Sciences v. 26 was used.

Findings

One key finding from this research was that construction firms with solid social capital built by their management staff are more connected and have better adaptive systems than firms with low capital. A company’s development programs must concentrate not only on the development of targeted or selective know-how and professional abilities but also on capacity creating, collaboration and knowledge creation and sharing among its employees.

Originality/value

Using this study’s findings, construction professionals can develop successful solutions to the COVID-19 epidemic and future emergencies. Additionally, the comprehensive exposition of the implications, constraints and preventive methods in this study may enable scholars to discover current gaps in the literature and investigate other elements of the pandemic’s influence on the construction industry.

Details

Journal of Engineering, Design and Technology , vol. ahead-of-print no. ahead-of-print
Type: Research Article
ISSN: 1726-0531

Keywords

Click here to view access options
Article
Publication date: 22 October 2021

Fredrick Ahenkora Boamah, Jianhua Zhang and Md. Helal Miah

The effective and efficient implementation of daily work activities necessitates tacit knowledge sharing, boosting firm productivity. However, the link between tacit…

Abstract

Purpose

The effective and efficient implementation of daily work activities necessitates tacit knowledge sharing, boosting firm productivity. However, the link between tacit knowledge sharing within a company and its effects on organizational performance is unclear, so the purpose of this study is to examine the impact of sharing tacit knowledge on the success of a company.

Design/methodology/approach

Construction managers and senior managers were the study’s target participants. The correlation matrix was used to assess the significant correlation between study frameworks and the statistical approach of multiple regression was also used to test the hypotheses using statistical package for social sciences (SPSS) v.26.

Findings

The findings suggest that companies will be more willing and capable of making decisions based on experience when knowledge systems are used successfully. Furthermore, new organizational knowledge and particular evaluation procedures, such as anxiety and conflict resolution preparation, personal relationship and training improvement, mediation and task clarity, are explained, which can aid in success.

Originality/value

The study contributes to construction companies’ perception of knowledge sharing and recommends organizations to build capacity to encourage, improve engagement and review to maintain the dissemination of knowledge.

Details

Journal of Engineering, Design and Technology , vol. ahead-of-print no. ahead-of-print
Type: Research Article
ISSN: 1726-0531

Keywords

Click here to view access options
Article
Publication date: 1 October 2021

Muhammad Usman Shehzad, Jianhua Zhang and Phong Ba Le

The primary objective of this study is to assess the role of a collaborative culture in the organization’s knowledge management process (KMP) and how it is associated with…

Abstract

Purpose

The primary objective of this study is to assess the role of a collaborative culture in the organization’s knowledge management process (KMP) and how it is associated with radical and incremental innovation under the moderating role of ownership formapjm in Pakistani firms.

Design/methodology/approach

This research used the quantitative method and structural equation modeling approach to examine hypotheses with data obtained by the survey from 280 participants in 85 Pakistani firms.

Findings

The findings of this study indicate that the KMP significantly mediates between collaborative culture and two specific types of innovation, namely radical innovation and incremental innovation. In addition, the ownership form can serve as a moderator in the relationship between KMP and innovation capability.

Research limitations/implications

Future research should explore the moderating impact of other strategic or behavioral factors, such as self-efficacy, job experience, education level, optimism and organizational support, to better clarify the association between these latent constructs.

Practical implications

This research provides leaders with a better view of the mechanism of knowledge management and the impact of ownership form and possible influences in their organizations to foster innovation capabilities.

Originality/value

This paper has prompted theoretical and practical attempts on innovation management theory that allow firms to recognize the necessary factors and processes to improve the firm’s innovation capability.

Details

Business Process Management Journal, vol. 27 no. 7
Type: Research Article
ISSN: 1463-7154

Keywords

Click here to view access options
Article
Publication date: 5 August 2021

Fredrick Ahenkora Boamah, Jianhua Zhang, Dandan Wen, Mrs Sherani, Adil Hayat and Oleksandra Horbanenko

To effectively implement knowledge management, one prerequisite is to understand and implement the knowledge management enablers in the sense of optimal institutional…

Abstract

Purpose

To effectively implement knowledge management, one prerequisite is to understand and implement the knowledge management enablers in the sense of optimal institutional efficiency. This paper aims to analyze and measure the significant enablers in overseeing knowledge management in the construction sector.

Design/methodology/approach

The mixed-method technique was used to achieve the objective of this study and involved the application of detailed questions to project engineers and project managers within leading construction engineering companies, provided by the Institution of Engineering and Technology Ghana. In total, 150 questionnaires were collected and analyzed using the Statistical Package for Social Sciences v. 26.

Findings

The study confirms that the knowledge management enablers such as employees knowledge, motivations, effective decisions and strategic planning are some of the important ways in which construction professionals can achieve different strategic goals in many processes and concluded that the progress of the next generation knowledge management strategy will be based on content sharing, decision-making and by promoting the free flow of ideas.

Originality/value

The study offers perspectives into knowledge management enablers and recommends key performance factors, championed by Ghanaian construction contractors for institutional knowledge capture.

Details

International Journal of Innovation Science, vol. 14 no. 1
Type: Research Article
ISSN: 1757-2223

Keywords

Click here to view access options
Article
Publication date: 10 August 2010

Wu Xueli, Zhang Jianhua, Guan Xinping and Meng Hua

The purpose of this paper is to examine the criteria of uniqueness of the equilibrium point and the new stability criteria for stability of the equilibrium point. The new…

Downloads
167

Abstract

Purpose

The purpose of this paper is to examine the criteria of uniqueness of the equilibrium point and the new stability criteria for stability of the equilibrium point. The new stability condition is dependent on the size of delays.

Design/methodology/approach

The global asymptotic stability of a class of delayed bi‐directional associative memory (BAM) neural networks is studied. Some new sufficient conditions are presented for the unique equilibrium point and the global stability of BAM neural networks with time delays by constructing Lyapunov functions and using the linear matrix inequality. A numerical example is presented to illustrate the effectiveness of the theoretical results.

Findings

Based on the mathematical method and matrixes inequality skill, some criteria are obtained which contain the unique equilibrium point and the global stability of BAM neural networks.

Research limitations/implications

The paper proposes the new Lyapunov function and new skill to compose matrixes inequality.

Practical implications

A very useful method for BAM neural network to judge the uniqueness of the equilibrium point and stability.

Originality/value

The new mathematical model is proposed about the production process, and the new control method is used in the temperature system for a double layers welded pipe in welding process.

Details

Kybernetes, vol. 39 no. 8
Type: Research Article
ISSN: 0368-492X

Keywords

Click here to view access options
Book part
Publication date: 30 November 2020

Vivake Anand, Kinza Yousfani and Jianhua Zhang

Natural disasters occur all around the world, in the last two decades these natural disasters have brought sever damages to the world economy. Mostly developing countries…

Abstract

Natural disasters occur all around the world, in the last two decades these natural disasters have brought sever damages to the world economy. Mostly developing countries bear severe consequences due to these natural disasters. In July 2010, Pakistan faced a massive flood, which affected almost all the countries. The disaster affected all sectors like daily life, transportation, infrastructure, etc., of the country. GOP did not have enough resources to cope with this giant disaster and called for international help. Local and international NGOs participated with GOP in the early phases of recovery. Millions of dollars were given away as the initial impact of this disaster, and GOP and other relief agents have spent other million to provide initial recovery and relief. GOP will need billions of dollars further to continue recovery from the disaster of 2010.

Details

International Case Studies in the Management of Disasters
Type: Book
ISBN: 978-1-83982-187-5

Keywords

1 – 10 of 93